Force-feed lubricator.



H. SMITH FORGE FEED LUBRIGATOR. APPLICATION FILED MAB.21, 1914.

1, 1 32,627. Patented Mar. 23, 1915:

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E. SMITH.

FORGE FEED LUBBIGATOR- APPLICATION FILED mlml, 1914.

1,132,627, Patented Mar. 23, 1915.

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FORGE FEED LUBRIUATOR.

APPLIGATION FILED MAR. 21, 1914. 1,132,627. I Patented Mar. 23, 1915.

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THE NORRIS PETERS CO7. PHOTOLITHQ. WASHINGIDN. D. c.

E. SMITH.

FORGE FEED LUBRIOATOB.

APPLICATION nun IAB..21, 1914.

1,132,627. Patented Mar. 23, 1915.

5 SHEETS SHEET 4.

lfi'hwssas 7% I mar 665M M WK fl/Mfl' Mar THE NORRIS PETERS CO"PHOmUTHQ, WASHING H. SMITH,

FORCE FEED LUBRIGATOR.

APPLICATION FILED mum, 1914.

1, 1 32,627 Patented Mar. 23, 1915.

5 SHEETSSHEET 5.

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UNITED STATES PATENT OFFICE.

HOWARD SMITH, OF DETROIT, MICHIGAN, ASSIGNOR TO MCCOBD MANUFACTURINGCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

FORCE-FEED LUBRICATOR.

Specification of Letters Patent.

Patented Mar. 23, 1915.

Application filed March 21, 1914. Serial No. 826,216.

To all whom it may concern Be it known that I, HOWARD SMITH, a citizenof the United States, residing at Detroit, in the county of \Vayne and,State of Michigan, have invented certain new and useful Improvements inForced-Feed Lubricators; and I do hereby declare the following to be afull, clear, and exact description of the invention, such 'as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates broadly to fluid distributers, and more especiallyto forced feed lubricators; and has for its object to provide aneificient pump of extremely simple structure, adapted to pump apredetermined charge of oil, variable at will, first from the reservoiror other source to the sight-feed well, and then back to the pump andout, throughthe final delivery pipe, to the bearin to be lubricated, orother point desired.

0 these ends, my invention consists of the novel devices andcombinations of de vices hereinafter described and pointed out in theclaims.

The invention is illustrated in the accompanying drawings, wherein likenotations refer to like parts throughout the several views.

In said drawings, Figure 1 is a vertical longitudinal section, takenlengthwise of the pump and the casting which carries the same, removedfrom the reservoir, and showing the movable elements in what may beregarded as their normal positions, with some parts shown in elevationand some broken away; Figs. 2 and 3 are similar views of the same parts,but showing the movable elements in different positions, for comparisonwith each other and with Fig. 1; Fig. 4: is a vertical section throughthe oil reservoir, parallel to one of the pumps, with some parts brokenaway; Fig. 5 is a plan view of one of the pumps detached, with someparts broken away and others shown in section; Fig. 6 is a view of theparts shown in Fig. 5, partly in elevation and partly in verticalsection on the irregular or broken line as m of Fig. 5; Fig. 7 is adetail, afiording a plan view of the finger piece of the angularlyadjustable intercepting stop, for the pump piston, and its gage plate;Fig. 8 is a detail in plan, showing slottedtguide bracket for stop pincarried by the stem head of the pump piston; and Fig. 9 is a sectionthrough the valve and its seat on the line 00 92 of Figs. 1, 2 and 3.

The numeral 1 (Fig. l) represents the oil reservoir, and 2 its cover orcover section, as the case may be.

The numeral 3 represents a casting fixed to and depending from the coversection 2, within the oil reservoir 1, when the parts are in properworking position. I

The numeral 1 represents a shaft having its hearings in the casting 3,and having fixed thereto a worm gear 5, which, when the parts are inworking position, engages with a' worm 6 fixed to a shaft 7 mounted inthe walls of the reservoir 1, and having on its exterior projecting enda pulley 8 for the application of power in the customary way.

The casting 3 is of suitable form to afford a sight-feed well 9 and avalve seat 10. This valve seat 10 is open, at its opposite ends, and isfitted with a combined slide valve and cylinder; or, in other words, theslide valve 11 is suitably recessed to afiiord a pump cylinder 12. Inthe cylinder 12 of said slide valve 11 is mounted a pump piston 13, thestem of which passes out through a stufiing box 1 1, at the inner orright hand end of the said combined cylinder and valve. The stem of saidpump piston 13 has removably secured thereto a stem head 15, having, atits inner end, an annular stop flange 16, and, at its outer end, a stoppin 17 projecting above and below the said head. The shaft 4 is providedwith an eccentric 18 fitted with an armed strap 19, the outer end ofwhich is pivotally connected to the outer end of the slide valve 11;and, under the rotation of said shaft 4:, said eccentric and armed strapwill impart to the combined valve and pump cylinder a constant stroke ordegree of travel, in opposite directions, in the valve seat 10.

The numerals 20, 21 and 22 represent parts of a rotary or angularlyadjustable intercepting stop for the piston 13 of the pump; and of theseelements, the numeral 20 represents the active part of the stop, thenumeral 21 its stem seated in the casting 3 and the cover section 2; andthe numeral 22 a finger piece fixed to the upper end of the stop stem 21and having a pointer 23 work ing over a gage plate 24 on the face of thecover section 2, as best shown in Fig. 7.

A stiff leaf spring 25 encirclesthe stem 21 of the stop, between thecasting 3 and the hub of the active part of the stop 20.;

which spring serves yieldingly to hold the 5 stop in whatever positionit may be set.

Said active stopping element 20 is in the flange. The said outer orperipheral stopping surface a of said segmental stopping cup 20 isformed on the arc of a true circle struck from the axis of the stop stem21 as a center, and the other or inner stopping surface I), afforded bythe inner wall of the cup flange, is eccentric, as best shown in Fig.5.Said stopping cup 20 is so positioned that its stopping flange worksbetween and stands in the path of the annular flange'16 and the stop pin17 of the stem head 15carried'by the projecting stem of the pump piston13; and, hence, it follows that the concentric or outer stopping surfacea of said stopping cup 20 will always intercept said pump piston, at aconstant point in its travel toward the axis of the stop, and may,therefore, properly be called the banking stop surface, and the'inner oreccentric stopping surface 6 of said cup 20 will intercept said pumppiston, in its travel in the opposite direction, or away from the axisof said stop at different points, to wit, earlier or later, according tothe angular adjustment of said stopping cup 20, and .may, therefore,properly be called the variablestop surface of the said cup. It furtherfollows, of course, that the amount of the displacement in the pumpcylinder, at the opposite ends of the piston 13, will depend upon theangular position in which the stopping cup 20 is set.

The lower end of the stop pin 17, carried at the outer end of the stemhead 15 of the pump piston 13, works in a slotted guide bracket 26 (seeFig. 8) fixed to the casting 3, as shown in Figs. 1, 2 and 3, andextending outward therefrom to the full length of the possible travel ofthe said pin; and, hence, this slotted guide bracket 26 will insure theright line reciprocation of the piston stem head 15 and the pin 17, and,at the same time, prevent any rotary motion thereof. This holding andguiding action of said pin 17 is important to insure the properprecision in the intercepting action of the cocentric or variable stopsurface of the stoppiston 13.

The casting 3 is tapped by a supply pipe 27 depending therefrom, andshown as having on its lower end an intake screen 28 near the bottom ofthe reservoir 1 and submerged in the oil Z, when the parts are inworking of the cup segment, and the other, marked I with the letter 6,is the interior of the cup.

ping cup 20 on the said 17 and the pump position, as shown in Fig. 4.Said casting?) is also tapped by a goose neck or dropper pipe'29,leading to the sight well 9,;under the glass of the sight-feed housing30 fixed to the cover section 2. The said casting 3 and cover section 2are also tapped by the final delivery pipe 31, for directing the oil tothe bearing to' be lubricated, or other point desired, and which pipe 31is shown as sight-feed well 9; and the other set of which ports, towit,those marked with the reference letters (Z, d and d cooperate to enablethe outer or left hand end of the pump to draw the charge of oil fromthe sight well 7 9 back into the cylinder of the pump, and to forcethesame out therefrom and through the final delivery pipe 31 to the bearingto be lubricated, or other point desired. Of the .7

said ports, the port a is located in the lower face of the valve seat10, in line with the supply pipe 27; the port 0 is in the under side ofthe valve 11, in proper position to cooperate with the port 0, at theproper time, to admit the oil to the inner end of the pump; and the port'0 is in the upper wall of the valve 11, and, at the proper time, co-

operates with the portc in the upper face of the seat 10, to permit thecharge of oil to be forced out from the inner end of the pump throughthesaid ports and the dropper'pipe' 29 into thesightfeed well 9. Theport cZ' is a long duct-like port, bored in the casting 3 and leadingfrom the sight-feed well 9 to the upper face of the valve seat 10, ascan be understood by comparing the dotted line showing of Figs. 1, 2 and3 with the full line showing of Fig. 9; the port d is in the upper wallof the slide valve 11, in position to cooperate with said long'port orduct cl, at the proper time, to permit the pump to draw therethrough thecharge of oil from the sight well 9 into the outer end of the pumpcylinder; and the port 1? is located'in the valve seat 10, in properposition to cooperate with the port d of the valve 11, at the propertime, to permit the pump to force the oil from the outer end of thepump, through the said ports d and d and into the final delivery pipe 31past the.

spring-seated check valve 32. With these stated relations of these twodiflerent sets of ports in mind, the cycle of actions can be readilytraced.

Operation: Assume that the movable ele ments are in the position shownin Fig. 1, to

wit, that. the combined slide valve 11 and cylinder 12, together withthe pump piston 13 carried thereby, are all at the right hand or innerlimit of their travel toward the axis of the stopping cup 20, with theannular flange 16 of the piston stem head 15 abutting the outer orbanking surface a of sa1d cup; and that the inner end of the pumpcontains a charge of oil just previously drawn in from the reservoir.Then, under the continued rotation of the shaft 4, the eccentric 18 andits armed strap 19 will move the combined valve and cylinder outward tothe left hand limit of their travel, or away from the axis of thestopping cup 20; and the pump piston 13 will be carried with thecombined valve and cylinder until the stop pin 17 of its stem head 15comes in contact with the inner or eccentric stop surface I) of said cup20, whereupon the piston 13 will be intercepted while the combined valveand cylinder continue to move out- Ward to their limit, or until theyreacha point a little beyond the position shown in Fig. 2, and therebythe inner end of the cylinder 12 will be moved toward the inner end ofthe piston 13, at a time when the ports 0 and c are in communication,and the charge of. oil will be forced from the inner end of the pump outthrough said ports and the dropper pipe 29 to the sight-feed well 9, andthe outer end of the cylinder 12 will, in the same period, be moved awayfrom the outer end of the piston 13, and under the displacement therebyproduced, the charge of oil will be drawn from the sight well 9, throughthe ports (1 and d, then in communication, into the outer end of thepump. Then, under the continued rotation of the shaft 1, the eccentricand its armed strap will begin to .move the combined valve and cylindertoward the right or inward toward the axis of the .stopping cup 20, andwill carry the piston 13 with the valve and cylinder until the stopflange 16 of its stem head 15 strikes the exterior or banking surface aI of the stopping cup 20, at which instant the port (l of the valve willbe in communication with the port d of the seat and the final deliverypipe 31, as shown in Fig. 3; and, under the continued inward movement ofthe combined valve and cylinder, the charge in the outer end of the pumpwill be forced outward, through the ports (1 and d and the finaldelivery pipe 31, to the bearing to be lubricated; and, at the sametime, displacement will be occurring between the inner end of thecylinder and the inner end of the piston, while the intake ports a and 0are in communication with each other; and, hence, a new charge will besucked in from the reservoir, while the combined valve and cylinder ismoving from the position shown in Fig. 3 into the position shown in Fig.1, which was assumed as the starting point for tracing the cycle ofactions. Of course, it will be understood that all the members of saidsetsof ports must be accurately located, and that the valve must havethe requisite lap or lead, or both, to insure the cooperation of theseport members with the needed nicety to insure the desired predeterminedcharge of oil.

In the drawings, the stopping cup 20 is shown set to secure a maximumcharge of oil; or, in other words, so that its inner or eccentricstopping surface b will intercept the pump piston at the earliest point,in its possible outward travel, with the combined valve and cylinder,away from the axis of the stop. By setting the said stopping cup 20 inits other extreme position, a minimum displacement may be secured in thepump, and, hence, a minimum charge of oil can be drawn in and handledthereby; and, if the said stopping cup 20 be set in any one of itspossible intermediate posi tions, an intermediate amount of displacementcan be had in the pump, and thus any desired charge of oil be drawn inand handled thereby. Inasmuch as the eccentric stop surface Z) or innerwall of the stopping cup 20 varies on a continuous curve, from itssmallest to its greatest eccentricity, it, of course, follows that anextremely. fine graduation of the pump displacement, and, hence, in thecharge of oil, is available therefrom. This is a matter of largeimportance, in the usage of this class of lubricators; for it is wellknown that the range in sizes of charge should be considerable and thegraduation fine, in order to adapt the same lubricator to differentsizes and kinds of bearings. This pump meets all these conditions, andis, at the same time, reliable. It will be noted, for example, that ithas no check valves of any sort within the pump proper; and, hence, itsactions cannot be interfered with by sediment or other foreignsubstances. The eiliciency of this pump, for the purposes had in view,has been demon strated by considerable practical usage thereof. Itshould be noted that the pump will work equally well regardless of thedirection or rotation of the shaft 4. In other words, the pump can bereversed without throwing any of the cooperative elements of the pumpout of time.

Of course, it will be understood that, while only a single pump has beenillustrated, any desired number might be placed side by side in the samereservoir and be actuated from a common shaft. It should also, perhaps,be noted that the pump shown is removable with the cover section shown,without disturbance of any of the working parts carried by thereservoir; and that, if a series or bank of pumps were employed, theywould all be supported from the reservoir cover and be removabletherewith.

I The construction can, of course, be'

changed in detail, without departingfrom the spirit of my invention. e

What I claim is 1. The combination with a sight-feed well andpump-actuating mechanism, of a double-acting single cylinder and singlepiston pump, and positive single means to uniformly vary thedisplacement between both of the opposite ends of said piston andcylinder, whereby apredetermined charge of fluid, variable at will, maybe first pumped from source to said sight-feed well, and thence to thepoint of final delivery, by the opposite ends of said pump,substantially as described. e

2. The combination with asight-feed well and a valve seat, of a combinedvalve and pump cylinder, having a constant travel in said seat, a pumppiston carried by the cylinder of said valve, an adjustable interceptingstop for said piston, and two sets of cooperating ports in said valveand seat, whereby a predetermined charge, variable at will, maybe firstdrawn from source to said sight-feed well, by one end of said pump, andthen be drawn back into the cylinder and forced out to the point offinal delivery, by the opposite end of said pump, substantially asdescribed. 7

3. The combination with a sight-feed well and a valve seat, of acombined valve and pump cylinder, having a constant travel in said seat,a pump piston carried bythe cylinder of said valve, an adjustable stophaving two stop surfaces, one constant and the other variable, forintercepting the piston in opposite directions of its travel, and twosets of cooperating ports in said valve and seat, whereby said singlepump is made double-acting to pump a predetermined charge, variable atwill, from source to said well, and thence out to the point of finaldelivery, substantially as described.

4:. Ina lubricator, the combination with a reservoir and cover for thesame, of. a casting fixed to and depending'from said cover into thereservoir, and affording a sightfeed well and a valve seat, and adouble-actcomprising a combined valveand pump cylinder movable in saidseat, an eccentricbearing shaft mounted in said casting, an

armed strap fitted to said eccentric and pivotally connected to theouter end of said combined valve and cylinder, and imparting a constantstroke thereto, a pump piston carried by the cylinder of said valve, anadjustable stop for intercepting said piston, and two sets ofcooperating ports in said valve and valve seat, arranged to cooperatesubstantially as described and for the purposes set forth. I

5. In a lubricator, the combination with a reservoir and a cover for thesame, of a casting, affording a sight-feed well, and a valve seat,depending from said cover, and

6. The combination'with a valve seat, of s a combined valve andcylinder, having a constant travel in said seat, a piston carried in thecylinder ofsaid valve, and having a stem head with stop 'pin, anadjust-' able intercepting stop for said piston, en-

gageable-with said stop pin, and a guide for said stop pin serving toinsure the right line motion of said pin, and to prevent rotary movementof said pin and piston, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

HOWARD SMITH. V

Witnesses:

A. C. PICARD, HOWARD GREER,

Copies, of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C."

